.getFlexDirection() {
    display: flex;
    flex-direction: column;
  }
  
  .design-layout {
    --design-border-color: #d9d9d9; //边线颜色
  
    width: 100%;
    height: 100%;
    background: #ffffff;
    .getFlexDirection();
    border: 1px solid var(--design-border-color);
  
    .design-header {
      padding: 0.5rem;
      border-bottom: 1px solid var(--design-border-color);
    }
  
    .design-content {
      flex: auto;
      overflow: hidden;
    }
  }
  